filewriter

I am developing a chrome extension. I open an image file in canvas, I apply some changes to it, then I am trying to save it to the HTML5 filesystem api. First I get the dataURL from the canvas: var dataURL = canvas.toDataURL('image/png;base64'); Then just the data: var image64 = dataURL.replace(/data:image\/png;base64,/, ''); Then I make a Blob. var bb = new BlobBuilder(); bb.append(image64); var blob = bb.getBlob('image/png'); Then I request the file system with the following function onInitFs(); function onInitFs(fs) { fs.root.getFile('image.png', {create: true}, function(fileEntry) { //

So far I have this: File dir = new File("C:\\Users\\User\\Desktop\\dir\\dir1\\dir2); dir.mkdirs(); File file = new File(dir, "filename.txt"); FileWriter archivo = new FileWriter(file); archivo.write(String.format("%20s %20s", "column 1", "column 2 \r\n")); archivo.write(String.format("%20s %20s", "data 1", "data 2")); archivo.flush(); archivo.close(); However. the file output looks like this: Which I do not like at all. How can I make a better table format for the output of a text file? Would appreciate any assistance. Thanks in advance! EDIT: Fixed! Also, instead of looking like column 1

Ok so I am learning about I/O, and I found the following code in one of the slides. can someone please explain why there is a need to have a FileWrite, BufferedWriter and PrintWriter? I know BufferedWriter is to buffer the output and put it all at once but why would they use FileWriter and PrintWriter ? dont they pretty much do the same with a bit of difference in error handling etc? And also why do they pass bw to PrintWriter ? FileWriter fw = new FileWriter (file); BufferedWriter bw = new BufferedWriter (fw); PrintWriter outFile = new PrintWriter (bw); Presumably they're using a FileWriter

I wrote a file through my Android program like this: String file = Environment.getExternalStorageDirectory().getAbsolutePath() + "/Files/hello.txt"; BufferedWriter writer = new BufferedWriter(new FileWriter(file)); writer.write(str + "\n"); \\ Yeah, 'str' has a value there writer.close(); The program does its job and it finishes. Now I hit the back button on Android to close the application. If I then go to an Android file browser (like Astro) I can see the file, but if I mount the SD card on Windows, I can't see the file! Now, if I go to Settings → Applications → Manage Applications → "Force

I'm having trouble to append data to an existing file in HDFS. I want that if the file exists then append a line, if not, create a new file with the name given. Here's my method to write into HDFS. if (!file.exists(path)){ file.createNewFile(path); } FSDataOutputStream fileOutputStream = file.append(path); BufferedWriter br = new BufferedWriter(new OutputStreamWriter(fileOutputStream)); br.append("Content: " + content + "\n"); br.close(); Actually this method writes into HDFS and create a file but as I mention is not appending. This is how I test my method: RunTimeCalculationHdfsWrite